Separable snap fastener



ocru 15,` 1929. F. s. CARR 1,731,704

Filed April 21. 1927 Patented Det. 15, 1929 UNITED STATE PATENT FHCE.

FRED S. CARR, 0F NEWTON.. MASSACHUSETTS, ASSGNOR, BY MESNE ASSIGNMENTS,

TO UNITED-CARR `FASTENER CORPORATON, OF CAMBRDGE, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS Application filed April 21,

My invention aims to provide improvements in separable snap fasteners of the type particularly, thoughnot exclusively, adapted for fastening carpets and the like to floors.

In the drawings, which illustrate a preferred embodiment of the invention Figure l is a plan view of a corner portion of a carpet showing the underlying fastening means in dotted lines;

Fig. 2 is a section taken on the line 2-2 of Fig. l, the stud being shown in elevation; Y

Fig. 3 is a plan View of the socket member before attachment;

Fig. 4 is a side elevation of the socket member shown in Fig. 3 g and Fig. 5 is a section taken on the line 5-5 of Fig. 1, showing the normal relation of the socket to with. f

Referring to the embodiment of my invention illustrated by the drawings, Ihave shown a simple form of fastener socket A secured to the under side of a carpet 1 for engagement with a stud B secured to the floor 2. n

The socket A is in the form of an annular casing pressed from a single piece of metal. It is provided with an outer wall 3 parallel with the axis of the socket and a pair of opposed jaw portions 4 which curve inwardlv and upwardly from the lower edge wall and terminate at the stud-receiving aperture 5, as shown in Figs. 2 and 3. Attaching prongs 6 extend upwardly from the upper edge of the wall 8 and are preferably bent outwardly and downwardly, after passing through the carpet, to engage over the warp and weft threads.l as shown in Figs. 2 and 5. Ears 7 extend inwardly from the upper edge of the wall 8 between the prongs 6 and bear against the under side of the carpet (Fig. 2) to prevent the carpet from interfering with the action of the casing when being engaged with or disengaged from the stud B.

Substantial spaces 8 are provided between the side edges 9 of the jaws 4, and the wall 3 is severed by a slit 10 adjacent to one of these spaces to permit lateral contraction and expansion of the wall when the socket is being engaged with or disengaged from a stud.- These spaces are important inasmuch as the the stud when being engaged there- 1927. serial no. 155,436.

lspace opposite the slit 10 leaves the wall 3 of t the casing free to maximum flexing adjacent Vto where the greatest bend occurs and thereby reduces to a minimum the possibility of the socket becoming set. Furthermore, the spaces reduce the width of the stud-engaging ends of the jaws 4 to a point where one jaw may engage beneath the head 11 of the stud (Fig. 5), before it is necessary to expand the wall 3 so that the other jaw may engage the neck 12 of the stud B. Thus, when engaging the socket with and disengaging it from the stud B, the wall 3 of the socket is only required to expand one half as much as it would if the'jaws were of such dimensions that one vcould not be engaged with the neckf12 without expanding the wall 3.V

-xThe jaws 4 are curved'to facilitate entrance of the stud B in the stud-receiving aperture 5 vand are substantially inflexible so that en largement of the aperture occurs by spreadling the aws laterally with the wall 3 to permit the head l1 of the stud therethrough.

I do not wish to be limited to the specific embodiment of my invention illustrated and '7 described, my invention being best defined in the .following claims.

Claims:

l. A fastener socket comprising a studreceiving casing having a wall parallel with the axis of the casing, said wall being severed at one side to permit lateral expansion thereof, apair of oppositely disposed stud-engagvso ing jaw portions extending inwardly from y,

said wall and terminating at a stud-receiving aperture, said aws being laterally shiftable with said wall to permit enlargement of the stud-receiving aperture for the head of a stud to pass therethrough, the side edges of said jaws being spaced from each other to provide spaces of substantial length adjacent to said wall, and adjacent to the stud-receiving aperture thereby permitting engagement of the socket with a stud by hooking one aw into engagement with the neck of the stud and then pressing the other aw over the head to engage the neck, said first jaw acting as a fulcrum, and one of the. spaces between said side severed 'portion 'of said wall provide substantial resiliency to said wall where the greatest bend occurs.

2. A fastener socket comprising a stud-receiving casing having a wall parallel with the 5 axis of the casing, said wall being severed at one side to permit lateral expansion thereof, a pair of oppositely disposed stud-engaging jaw portions extending inwardly from said wall and terminating at a stud-receiving aperture, said jaws being laterally shiftable with said wall to permit enlargement of the studreceiving aperture for the head of a stud to pass therethrough, the side edges of said jaws being spaced from each other to provide spaces of substantial length adjacent to said wall, and adjacent to the stud-receiving aperture thereby permitting engagement of the socket with a stud by hooking one jaw into ,engagement with the neck of the stud and 2o then pressing the other jawy over the head to engage the neck, said first jaw acting as a fulcrum and one of the spaces between said side edges of the aws being located opposite the severed portion of said wall to provide substantial resiliency to said wall where the greatest bend occurs, a plurality of ears eX- tending inwardly at right angles to said wall for engagement of one face of a flexible socket- ,carrying medium to maintain the carrying medium above the plane of the wall from which said means extend to prevent interference with the operation of the jaw portions and a plurality of attaching prongs eX- tending upwardly from said casing between said ears for securing said casing'to its carrying' medium.

In testimony whereof, I have signed my name to this specification.

40 FRED S. CARR. 

